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A method for segmental flow microfluidic extraction and separation of copper, iron and zinc

A microfluidic and extraction technology, applied in the direction of improving process efficiency, can solve the problems of serious environmental pollution, easy emulsification of solution, low extraction efficiency, etc., and achieve the effects of simple processing technology, rapid phase separation and high extraction rate

Active Publication Date: 2018-02-09
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method overcomes the shortcomings of traditional solvent extraction of copper, such as low extraction efficiency, easy emulsification of the solution, difficulty in separating copper from impurities such as iron and zinc, serious environmental pollution, and high risk. This method has high efficiency, safety, low cost, no pollution, and separation The advantage of high efficiency, the present invention realizes through the following technical solutions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The segmented flow type microfluidic extraction method for separating copper, iron, and zinc uses a sulfuric acid system containing copper, iron, and zinc (containing Cu 2+ 3g / L, total iron 2g / L, Zn 2+ 1g / L) as the water phase, adjust the pH of the water phase to 2, and use 5-dodecyl salicylaldoxime and 2-hydroxy-5-nonylacetophenone oxime as the extraction agent (5-dodecyl The volume ratio of salicylaldoxime and 2-hydroxyl-5-nonylacetophenone oxime is 1:1) and 260# solvent naphtha is used as the oil phase of diluent composition (the volume percentage of extractant in the oil phase is 25%), will The water phase and the oil phase (the water phase and the oil phase are 1:1 according to the ratio of water to oil) enter the two cross-shaped microchannels (the width of the cross-shaped microchannel is 200μm, the depth is 50μm, and the length is 100mm) through the pump. At the inlet, the flow rate is controlled at 0.05mL / min, and the reaction is performed in a segmental flow ...

Embodiment 2

[0036] The segmented flow type microfluidic extraction method for separating copper, iron, and zinc uses a sulfuric acid system containing copper, iron, and zinc (containing Cu 2+ 3g / L, total iron 2g / L, Zn 2+ 1g / L) as the water phase, adjust the pH of the water phase to 2, and use 5-dodecyl salicylaldoxime and 2-hydroxy-5-nonylacetophenone oxime as the extraction agent (5-dodecyl The volume ratio of salicylaldoxime and 2-hydroxyl-5-nonylacetophenone oxime is 1:1) and 260# solvent naphtha is used as the oil phase of diluent composition (the volume percentage of extractant in the oil phase is 15%), will The water phase and the oil phase (the water phase and the oil phase are 1:1 according to the ratio of water to oil) enter the two cross-shaped microchannels (the width of the cross-shaped microchannel is 300μm, the depth is 100μm, and the length is 200mm) through the pump. At the inlet, the flow rate is controlled at 0.1mL / min, and the temperature is 50°C. After the segmental f...

Embodiment 3

[0039] The segmented flow type microfluidic extraction method for separating copper, iron, and zinc uses a sulfuric acid system containing copper, iron, and zinc (containing Cu 2+ 3g / L, total iron 2g / L, Zn 2+ 1g / L) as the water phase, adjust the pH of the water phase to 2, and use 5-dodecyl salicylaldoxime and 2-hydroxy-5-nonylacetophenone oxime as the extraction agent (5-dodecyl The volume ratio of salicylaldoxime and 2-hydroxyl-5-nonylacetophenone oxime is 1:1) and 260# solvent naphtha is used as the oil phase of diluent composition (the volume percentage of extractant in the oil phase is 15%), will The water phase and the oil phase (the water phase and the oil phase are 1:1 according to the ratio of water to oil) enter the two cross-shaped microchannels (the width of the cross-shaped microchannel is 600μm, the depth is 100μm, and the length is 300mm) through the pump. At the inlet, the flow rate is controlled at 0.15mL / min. After the reaction is performed in a segmental fl...

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Abstract

The invention relates to a method for extracting and separating copper from iron and zinc through segmented flow type micro-fluid, and belongs to the technical field of fluid extraction. A sulfuric acid system containing the copper, the iron and the zinc is used as a water phase, and an oil phase is formed by taking 5-dodecyl salicylaldoxime and 2-hydroxy-5-nonylacetophenone oxime as extraction agents and number 260 solvent oil as a diluent; the water phase and the oil phase enter a cross type micro-channel through a pump, and the flow speed is controlled to be 0.01 mL / min-10 mL / min; after a segmented flow reaction is performed for 0.1-20 s under the condition that the temperature ranges from 25 DEG C to 50 DEG C, products are collected from the outlet of the cross type micro-channel and stand to be layered; and Cu2+ is extracted and enters an organic phase, Fe3+, Fe2+ and Zn2+ remain in the water phase, and thus the copper is separated from the iron and the zinc. The method has the advantages of being high in efficiency, safe, low in cost, free of pollution and high in separation rate.

Description

technical field [0001] The invention relates to a method for extracting and separating copper, iron and zinc in a segmented flow type microfluid, belonging to the technical field of fluid extraction. Background technique [0002] Since the 1990s, an important trend in the development of natural science and engineering technology is miniaturization. The mixers, heat exchangers, absorbers, extractors, reactors and control systems required for chemical unit operations together constitute the microchemical industry. system. In the whole microchemical technology, the microreactor occupies the core position, and its flow has the characteristics of microflow. Although the use of microreactors cannot change the reaction mechanism and intrinsic kinetic characteristics, microfluidic technology can enhance chemical processes by changing the heat transfer, mass transfer and flow characteristics of fluids. Traditional reactors improve their processing capacity through small-scale-pilot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/40C22B15/00C22B19/20
CPCY02P10/20
Inventor 巨少华姜峰彭金辉张利波尹少华肖毕权李传华郭胜惠许磊张利华代林晴谢峰
Owner KUNMING UNIV OF SCI & TECH
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